# HG changeset patch
# User Kim Alvefur <zash@zash.se>
# Date 1616543282 -3600
# Node ID b2f9782497dd6dd2357c7c78cd959a7615625b2c
# Parent  0aa2971380e9ffac31d3983779c58c8099f5520f
util.datamapper: Don't include empty unwrapped arrays

Since there is no way to distinguish an empty such array from a
zero-length array. Dropping it seems like the least annoying thing to
do.

diff -r 0aa2971380e9 -r b2f9782497dd teal-src/util/datamapper.tl
--- a/teal-src/util/datamapper.tl	Wed Mar 24 00:34:22 2021 +0100
+++ b/teal-src/util/datamapper.tl	Wed Mar 24 00:48:02 2021 +0100
@@ -168,7 +168,10 @@
 						out[prop] = parse_object(propschema, c);
 					end
 				elseif proptype == "array" then
-					out[prop] = parse_array(propschema, s);
+					local a = parse_array(propschema, s);
+					if a and a[1] ~= nil then
+						out[prop] = a;
+					end
 				else
 					error "unreachable"
 				end
diff -r 0aa2971380e9 -r b2f9782497dd util/datamapper.lua
--- a/util/datamapper.lua	Wed Mar 24 00:34:22 2021 +0100
+++ b/util/datamapper.lua	Wed Mar 24 00:48:02 2021 +0100
@@ -138,7 +138,10 @@
 						out[prop] = parse_object(propschema, c);
 					end
 				elseif proptype == "array" then
-					out[prop] = parse_array(propschema, s);
+					local a = parse_array(propschema, s);
+					if a and a[1] ~= nil then
+						out[prop] = a;
+					end
 				else
 					error("unreachable")
 				end